Improvement in sewing-machines



R. CHANDLER.

Sewing-Machine.

No. 133,757. Patente dDec.1 0,1872.

Witue sees:

AM FHDTOi/THDGEAF'HIC CQMYIOSBORNELS PROCESS) UNITED STATES PATENTQFFICE.

RUFUS CHANDLER, OF NEW YORK, n. Y.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 133,757, dated December10, 1872.

To all whom it may concern:

Be it known that I, RUFUS CHANDLER, of New York city, in the county andState of New York, have invented. certain Improvements inSewing-Machines, of which the following is a specification My inventionrelates to an adjustable lifting device for the pressurefoot ofsewingmachines; its object being to raise the pressurefootautomaticallyto a certain yet variable point while the needle is in thework and release it again before the needle leaves the work, so as toenable the operator the better to turn corners and curves withoutchanging the length of stitch, the material being easily turned whilethe machine is rnnnin g, turning always on the needle as its center,thereby leaving no chance for the cloth to slip under the point of theneedle and make uneven stitches, which is of great importance in makingornamental work or making designs from patterns.

My improvement may be readily attached to any sewing-machine havingeither the top or under feed, and is constructed as follows,

reference being had to the drawing and to the letters of referencemarked thereon, in which- A is a lever, attached to the machine by astud, B, which serves as its fulcrum. A cam, U, is placed upon the mainshaft H, and communicates motion to theleverAso as to cause it to raisethe pressure-bar D, to which it is connected by the slotted piece E,which forms part of the lever, and is for the purpose of adjustingt-helength of the lever A so as to give greater or less motion to thepressure-bar, thereby raising the pressure-foot higher or lower, as maybe desired by the operator.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

The combination and arrangement of the adjustable lever A- E, the studB, and cam 0, when combined and arranged as and for the purpose setforth.

I RUFUS CHANDLER. Witnesses:

J. W. HOLMAN, A. LANGRIDGE.

